Fluid spraying device for dishwashing or rinsing apparatus



'.Sept 15, 1959 Filed Sept. 27. 1955 H. F. LYMAN FLUID SPRAYING DEVICE FOR DISHWASHING OR RINSING APPARATUS 3 Sheets-Sheer. 1

INVENTOR HCIMER F. LY MAN Sept. 15, 1959 LYMAN Y 2,904,265

' FLUID SPRAYING DEVICE FOR DISHWASHING 0R RINSING APPARATUS Filed Sept. 27, 1955 3 Sheets-Sheer. 2

INVENTOR HEIMER r. LYMAN Sept. 15, 1959 H. F. LYMAN FLUID SPRAYING DEVICE FOR DISK- WASHING Filed Sept. 27, 1955 OR RINSING APPARATUS 5 Sheets-Sheet a 2. M W /l? INVENTOR HDMER E- LYMAN ATTORNEY Unite States Patent FLUID SPRAYING DEVICE FOR DISHWASHING 0R RINSIN G APPARATUS Homer F. Lyman, Nutley, NJ.

Application September 27, 1955, Serial No. 536,825

8 Claims. (Cl. 239-'53) This invention relates to fluid spraying devices and more particularly to a fluid spraying device for dishwashing or rinsing apparatus.

The present invention provides a fluid spraying device for a dishwasher which device diverts a plurality of streams of washing fluid onto dishes being washed or rinsed which streams are directed from an elongated stream directing tubular member toward the dishes from a plurality of fluid outlets spaced from one another longitudinally of the member, the fluid being introduced into said member to flow longitudinally therein.

Normally, such fluid spraying devices comprise a spray pipe having a plurality of fluid outlets spaced longitudinally from one another along the pipe and so located as to direct a stream of fluid toward dishes to be washed or rinsed. The dishes are contained in a dish rack in rows so spaced from one another thatadjacent streams of fluid from the spray pipe are directed upon adjacent rows of dishes to be Washed or rinsed. Fluid under pressure is introduced into the spray pipe at or adjacent one end thereof and flows toward an opposite closed end of the pipe. A pressure head is thereby created in the spray pipe which results in the fluid being emitted from the fluid outlets under pressure. The fluid pressure of the streams emitted from the outlets decreases progressively from the outlet nearest said opposite end or closed end of the spray pipe toward the point of introduction of the fluid into said pipe. The rows of dishes washed or rinsed by the streams of fluid emitted from fluid outlets nearest said closed end of the spray pipe are subject to washing or rinsing by streams of fluid under greater pressure than the rows of dishes washed or rinsed by the streams of fluid emitted from fluid outlets nearest the a spraying device for a dishwashing machine is provided,

said device comprising a spray pipe which so receives fluid under pressure that said fluid flows longitudinally of the member toward a closed end thereof and wherein a plurality of streams of fluid under pressure are directed toward the dishes from a plurality of outlets spaced from one another along the fluid spray pipe. Flow-retarding means is positioned within the spray pipe in the path of flow of fluid therethro-ugh and intermediate the opposite ends thereof, the flow-retarding means being of such size and shape as to retard the flow of said fluid, fluid impinging thereon and flowing thereby in passing to said closed end of the pipe thereby providing pressure heads in the fluid flow path on opposite sides of the flow-retarding means which heads are of substantially the same pressure so that the streams of fluid emitted from fluid outlets on opposite sides of said flow-retarding means are under substantially the same pressure thusly resulting in a uniform washing or rinsing of the dishes in the rack of a dishwashing machine.

" The invention will be understood from the following description when considered in connection with the accompanying drawings forming a part thereof and in which:

Fig. 1 is a side elevation view of a dishwashing and rinsing machine embodying the present invention, parts of the casing of the machine being broken away;

Fig. 2 is a diagrammatic side view of the fluid-stream directing members of the dishwashing and rinsing machine shown in Fig. 1 and illustrating streams of fluid being directed onto dishes contained in a rack in said machine;

Fig. 3 is a plan view taken on the line 3-3 of Fig. 2;

Fig. 4 is a perspective view of one of the stream directing members of the present invention;

Fig. 5 is a longitudinal sectional view of the stream directing member of the present invention; and Fig. 6 is a cross-sectional view taken on the line 66 of Fig. 5.

Like characters of reference refer to like parts throughout the several views.

Referring to Fig. 1 of the drawings, the reference numeral 10 designates a casing which is substantially rectangular in cross-section. Casing 10 comprises opposite end walls 11 and 12, opposite side walls 13 and 14, a top 15 and a bottom 16 forming therebetween a washing and rinsing chamber 17. The opposite end walls and the side walls adjacent thereto are preferably welded together and the top and bottom are welded to the sides and ends so that the washing and rinsing chamber 17 is water-tight. The casing 10 is supported on legs 18, 19, 20 and 21, which legs each comprise an L shaped angle bar. Each of the legs is secured to the casing at a corner formed by the joining of the opposite sides of the casing and the opposite ends thereof.

A table adapted to support a dish rack 22 is positioned in the chamber 17 and substantially intermediatethe'top 15 and bottom 16. The table comprises spaced L-shaped angle bars 23 and 24 extending between the opposite end walls 11 and 12 adjacent to and in spaced relationship with the opposite side walls 13 and 14. The angle bars 23 and 24 are secured at one end thereof to a support '25 extending along the end wall 11 between side walls '13 and 14 and at the opposite end thereof to support 26 extending along the end wall 12 between said side walls. The rack 22, in the form of the invention illustrated, comprises an elongated tray open at the top and at the bottom thereof and having a plurality of supporting means for dishes 27 so arranged as to support the dishes in a plurality of spaced rows extending laterally of the tray. The rack 22 may be inserted in the chamber 17 either through the opening 28 in the end wall 12 or the opening 29 in the end wall 11. The opening 29 is closed by a door 30 while the opening 28 is closed by a door 31.

The dishes 27 are washed by directing streams of washing liquid under pressure on them from a plurality of Wash spray pipes positioned in the chamber 17 above and below the rack 22. Adjacent the top of chamber 17, wash spray pipes 32 extend substantially horizontally between the opposite end walls 11 and 12, the opposite ends of said pipes being spaced from said walls and the pipes being laterally spaced from each other. Each of the spray pipes 32 is secured at the liquid receiving end thereof to a T 33, the Ts being connected together by nipples to form a liquid inlet distributing pipe 34 which distributes liquid under pressure to each of the spray pipes 32. The end of the spray pipes 32 opposite the liquid receiving end attached to T 33 is closed by a water tight removable cap 35 and the spray pipe has 'a plurality of outlets 39 spaced from one another axially of the pipe, which outlets will hereinafter be more fully described.

As shown more particularly in Figs. 1 and 2, a plurality of lower wash spray pipes 36 which are similar to upper wash spray pipes. 32 are positioned below the angle barsv 23 and 24 and in spaced relationship with the bottom.16 of thechamben. The pipes 36 are adapted to direct washing fluid upwardly into the rack 22 supported on the. angle bars.- Pipes 36, like the pipes 32, extend substantially horizontally between the opposite end walls 11 and 12, the opposite ends ofthe pipes being spaced from saidwalls and the pipes being laterally spaced from each other. Each of the lower spraypipes is secured to a T connection 37, the T connections, with their connecting nipples, forming a lower liquid feed pipe 38 which receives liquid under pressure-and distributes said liquid to the various lower wash spray pipes 36. The lower spray pipes 36, like the upper spray pipes.32, each has. a plurality of spray slots 39 which. are spaced from one another axially, along the spray pipes, each of said lower spray pipes also being closed by a water tight closure cap 40 at the end therein opposite to the end of the spray pipe connected to T connections 37.

Upper liquid feed pipe 34 and lower liquid feed pipe 38. are in communication. with the outlet. 41 of pump 42, the suction (not. shown) of which pump communicates through a conduit 43 with a wash water tank 44 containing wash water within the casing 10 of the dish washing and rinsing machine and in the lower part thereof below thelower spray pipes 36. Intermediate spray pipes 36 and wash water tank 44 is a straining screen 45. through which wash water from upper spray pipes 32 andlower spray pipes 36, after flowing in contact with the dishes in. rack 22, passes into tank 44. A strainer 46 is. positioned over the inletof conduit 43 so that foreign. substance from-tank 44 will not pass into saidconduit and into pump 42.

Pump 42 is actuated by an electrical motor 47, the shaft 48 of which is connected to a pump shaft 49 througha coupling 50. Motor 47 is electrically connected to a manually operated wash switch 51 by an electrical conduit 52.. Wash control handle 53 controls the flow of wash water through conduit 34 to the wash spray, pipes.

After washing of the dishes is completed, as will hereinafter be described, the dishes in rack 22; arerinsed by streams of, rinse water directed downwardly thereover from an upper rinse pipe 54, which pipe is revolved from a center connection 55 by force of rinse water flowing into the upperpipe 54 through a connecting pipe 56, which pipe communicates with a main rinse conduit 57. A lower rinsewater spray pipe 58 is disposed below rack 22 and projects streams of rinsewater upwardly over the dishes in rack22. The lower rinse pipe 58 revolves in a manner similar to upper pipe 54. Lower rinse water pipe 58 communicates with main rinse conduit 57 through a lower connecting pipe 59.

Referring to Figs. 4 to 6, the wash spray pipes 32 and 36 of the present invention have a plurality of spray slots 39 therein which slots are spaced from one another axially along said spray pipes. As shown in Figs. and 6, the slots 39 in spray pipes 32 are cut in the under portion thereof while slots 39 in the spray pipes 32 are cut in the upper portion thereof. The slots 39 extend through the wall of the spray pipes in a plane which is vertical to the longitudinal axis of the pipe, each slot having sides 60 and 61 which extend in planes vertical to said horizontal axis of the pipes.

Positioned within each of spray pipes 32 and 36 in the path of flow of wash fluidv therein is a flow-retarding member 62 which member is positioned in said pipes intermediate the opposite ends thereof. As shown more particularly in Figs. 5 and 6, flow retarding member 62 comprises a substantially octagonally-shaped plate which extends transversely of the liquid flow path in said spray pipes in a plane substantially vertical to the horizontal axis of the pipes. The member 62 is supported on one end of a rod 63, the opposite end of which rod is attached to cap 35 or 40 on spray pipes 32 or 36. In the embodiment of the invention illustrated, member 62 is formed of a square metallic plate each of the corners 64, 65, 66 and 67 of which are bent in the direction of flow of liquid throughthe pipe and toward caps 35 or 40 to form a plurality of prongs 68.

Since rod 63, to which member 62 is attached, is secured to caps 35 or 40 and said caps are removably attached to the spray pipes 32 or 36, member 62 is readily removable from the pipes with the caps 35 and 40 when such caps are removed from the spray pipes for cleaning of said pipes.

Member 62 is of such size and shape in relationship to the inside diameter of the spray pipes that liquid under pressure flowing through said pipes toward cap 35 or 40 is retarded in its flow. Fluid impinges on said member and passes beyond said member to flow against cap 35 or 40 thereby creating a. pressure head between the member 62 and the end of the pipe attached to T-connection 33 or T-connection 37 and a pressure head between member 62 and caps 35 or 40. By way of ex ample, in practicea sheet metal member 11/16" square having corners 64, 65, 66 and 67 bent as hereinbefore set forthto form octagonal sides each with a dimension of. 15/64" has been found suitable for aspray pipe having a diameter of. 1" with awall thickness. of .062. Also, it has been found suitable with such spray pipes to space slots.39 on centers 1%" apart on spray pipes up to 24%" long on to space said slots on centers 3" apart on sprayv pipesover. 24% long.

In operatiomwhen it isdesired to wash and rinse a rack 22 of dishes 27,.the.rack is positioned within the washing and rinsing chamber 17 and supported on angle bars. 23 and 24 of the supported table within the chamber. Openings 28 and 29 in the opposite end walls of the dishwashing and rinsing machine are thereafter closed by closing doors 30 and 31, respectively. The dishes are then washed by setting switch 51 in its On position so that electrical current flows from an electrical source to motor 47. Motor 47 is thusly set in operation which drives pump 42 through shaft 48, connection 50 and. pump shaft 49. Wash water from wash water tank 44 within the dishwashing and rinsing machine is caused to flow through the strainer 46 into suction conduit 43 through pump 42 andthen is forced under pressure into wash water conduit 34 and 38 whence it passes into the'lower spray pipes 36 and into upper wash spray pipes 32, respectively. Liquid under pressure flows through pipes 32 and 36 toward caps 35 and 40, respectively, said liquidimpinging on member 62 and'passing beyond said member to flow against caps 35 or 40 thereby creating a pressure head between the member 62 and the end of water spray pipes attached to T connection 33 or T connection 37 and another pressure head between members 62 andcaps 35 or 40. The pressure heads thusly created on opposite sides of member 62 are of substantially the same pressure. Streams of washing liquid projecteddownwardly from upper spray pipes 32 are emitted through slots 39 which streams are directed downwardly in a vertical direction. The liquid pressure in each of which streams are substantially equal on opposite sides of member 62. The dishes 27 in each row in rack 22 are thusly washed by streams under substantially thesame presure. Likewise, a plurality of streams of washing fluid, which streams are also under substantially equal pressure, are projected upwardly from lower wash water spray pipes 36 onto dishes 27 in rack 22 in streams which are projected vertically upwardly.

After the dishwashing operation is completed, the dishes are rinsed by flowing rinse water through main rinse conduit 57 into upper rinse pipe 54, which pipe is revolved from its center connection 53 by force of the. rinse water. flowing into theupper pipe. Also, rinse water from the same conduit 57 passes into lower rinse water spray pipe 58 which, through the force of said water is revolved, and the streams therefrom are projected upwardly over the dishes in rack 22.

Inasmuch as various modifications may be made in the form of the invention herein disclosed and in the location and relative arrangement of the several parts of the invention without departing from the principles thereof, it will be understood that the invention is not to be limited excepting by the scope of the appended claims.

What is claimed is:

1. A device for spraying cleaning fluid comprising a tubular member, said tubular member having a plurality of axially spaced discharge openings adapted to be directed toward an article to be cleaned, means for introducing fluid under pressure into said tubular member to flow longitudinally thereof toward one end of said tubular member, means closing said one end of the tubular member, a flow restricting member in said tubular member in the path of flow of said fluid, said flow restricting member comprising a plate extending transversely of said tubular member and disposed in an intermediate position with respect to said discharge openings to cause substantially equal pressure heads of the fluid on either side of said plate and substantially equal pressure heads across each opening.

2. A device for spraying cleaning fluid comprising a tubular member, said tubular member having a plurality of axially spaced discharge openings adapted to be directed toward an article to be cleaned, means for introducing fluid under pressure into said tubular member to flow longitudinally thereof toward one end of said tubular member, means closing said one end of the tubular member and removably secured thereto, and a flow restricting member in said tubular member in the path of flow of said fluid, said flow restricting member being attached to said closing means in spaced relationship thereto and comprising a plate extending transversely of said tubular member and disposed in an intermediate position with respect to said discharge openings to cause substantially equal pressure heads of the fluid on either side of said plate and substantially equal pressure heads across each opening.

3. A device for spraying cleaning fluid comprising a tubular member having a horizontally extending longitudinal axis, said tubular member having a plurality of axially spaced discharge openings adapted to be directed toward an article to be cleaned, said discharge openings comprising slots extending through the peripheral wall of said tubular member which slots are in a plane vertical to a longitudinal axis of the tubular member, means for introducing fluid under pressure into said tubular member to flow longitudinally thereof toward one end of said tubular member, means closing said one end of the tubular member, and a flow restricting member being attached to said closing means in spaced relationship thereto and comprising a plate extending transversely of said tubular member and disposed in an intermediate position with respect to said discharge openings to cause substantially equal pressure heads of the fluid on either side of said plate and substantially equal pressure heads across each opening.

4. A fluid spraying device for dishwashing and rinsing machines through which liquid under pressure is directed onto dishes to be cleaned, comprising a spray pipe having a plurality of axially spaced discharge openings therein adapted to be directed toward the dishes to be cleaned, means for introducing liquid under pressure into said spray pipe to flow longitudinally thereof toward one end of the pipe, means closing said one end of the spray pipe, and a flow restricting member in said spray pipe in the path of flow of liquid therethrough, said flow restricting member comprising a plate extending transversely of the liquid path of flow therein and disposed in an intermediate position with respect to said discharge openings to cause a substantially equal pressure head of the fluid on either side of said plate and substantially equal pressure heads across each opening.

5. A fluid spraying device for dishwashing and rinsing machines through which liquid under pressure is directed onto dishes to be cleaned, comprising a spray pipe having a plurality of axially spaced discharge openings therein adapted to be directed toward the dishes to be cleaned, means for introducing liquid under pressure into said spray pipe to flow longitudinally thereof toward one end of the pipe, means closing said one end of the spray pipe, and flow retarding means positioned within said spray pipe intermediate the opposite ends thereof in the path of flow of liquid therethrough, said flow retarding means comprising a substantially octagonally-sh-aped plate supported within said pipe and extending transversely of the liquid path of flow therein and of such size as to retard the flow of fluid through said pipe and create substantially equal pressure heads within said pipe on opposite sides of the flow retarding member.

6. A fluid spraying device for dishwashing and rinsing machines through which liquid under pressure is directed onto dishes to be cleaned, comprising a spray pipe having a plurality of axially spaced discharge openings therein adapted to be directed toward the dishes to be cleaned, means for introducing liquid under pressure into said spray pipe to flow longitudinally thereof toward one end of the pipe, means closing said one end of the spray pipe, and flow retarding means positioned 'within said spray pipe intermediate the opposite ends thereof in the path of flow of liquid therethrough, said flow retarding means comprising a substantially square plate with the corner portions thereof directed in the direction of flow of liquid in said flow path thereby to form an octagonally-shaped plate, said plate being supported in the pipe and extending transversely of the liquid path of flow therein and being of such size as to retard the flow of fluid through said pipe on opposite sides of the flow retarding member.

7. A fluid spraying device for dishwashing and rinsing machines through which liquid under pressure is directed onto dishes to be cleaned, comprising a spray pipe having a plurality of axially spaced discharge openings therein adapted to be directed toward the dishes to be cleaned, means for introducing liquid under pressure into said spray pipe to flow longitudinally thereof toward one end of the pipe, means closing said one end of the spray pipe and removably secured thereto, flow retarding means positioned within said spray pipe intermediate the opposite ends thereof in the path of flow of liquid therethrough, said flow retarding means being of such size as to retard the flow of fluid through said pipe and create substantially equal pressure heads within said pipe on opposite sides of the flow retarding member, and means secured to said closing means and said flow retarding means whereby said flow retarding means is removable from the spray pipe with the closing means.

8. A fluid spraying device for dishwashing and rinsing machines through which liquid under pressure is directed onto dishes to be cleaned, comprising a spray pipe having a plurality of axially spaced discharge openings therein adapted to be directed toward the dishes to be cleaned, means for introducing liquid under pressure into said spray pipe to flow longitudinally thereof toward one end of the pipe, means closing said one end of the spray pipe and removably secured thereto, flow retarding means positioned within said spray pipe intermediate the opposite ends thereof in the path of flow of liquid therethrough, said flow retarding means comprising a plate extending transversely of the liquid path of flow in said spray pipe and being of such size as to retard the flow of fluid through said pipe and create substantially equal pressure heads within said pipe on opposite sides of the flow retarding member, and a rod secured to said closing 7 means and said plate whereby said flow retardingmeans 1,664,865 is removable from the spray pipe with/the closingvmeans. 1,783,237

a 2,633,399 References Cited in the file of this patent UNITED STATES PATENTS 624,196 1,311,496 Castellini July 29,1919 674,421

8 Snow Apr. 3, 1928 Greer Dec. 2, 1930 Haas Mar. 31, 1953 FOREIGN PATENTS Great Britain May 30, 1949 Germany Apr. 14, 1939 

